Am I being too jealous and insecure?

My boyfriend, first off- I love him VERY much. But I am insecure, always have been. He calls other girls gorgeous all the time, even his ex-wife. He goes on about how gorgeous I am but it's like... it doesn't mean anything to me because he finds most girls beautiful and I don't feel special. I am a jealous person and I hate when he talks about his ex wife and how great she is. I feel like I will always be 2nd best even though he said he'd never get back with her. I don't like his best friend Maria because they admitted to liking eachother at one point, before he met me and they didn't date but I badgered him about it and he said "I'm not going to lie, if we broke up- I would date her"... am I stupid for feeling horrible after hearing that? He says she's really pretty and then he says I am and I'm like... okay, so is everyone else. So what makes me different from all his gorgeous friends? Am I being an idiot? Please tell me if I'm being too jealous. He recently told me he loves me so much for the first time, when we thought I was pregnant. And he said if he was in love w/ someone else, he would tell me instead of wasting my time but he loves me, no one else.